Patent GB-190520305-A (GB)
Title: Improvements in Rotary Hydraulic and other Engines for Revolving Gun Mountings and for similar purposes.
Filed: 1905-10-07
Granted: 1906-05-03
Abstract: 20,305. Armstrong, Whitworth, & Co., Sir W. G., and Wright, R. Oct. 7. Mountings.-A rotary hydraulic or other engine, for revolving gun mountings and for similar purposes, is formed by placing six single-acting cylinders equidistantly around the crank-shaft, so that the mounting receives a very uniform turning movement. The valve is of the balanced revolving type and is run at a lower speed than the engine, having as many sets of pressure and exhaust ports as is the inverse ratio of its revolutions to that of the crank-shaft. A mechanically-driven lubricating-pump is provided to give forced lubrication. Means are also provided to take up the wear in the toothed wheels, which form the gearing between the crank-shaft and the spindle.. Fig. 2 shows an end view of the engine,-and Fig. 4 a vertical section. The cylinders 1 ... 6 are all connected to the crank-shaft A, and the pressure fluid is admitted to these cylinders by the valve E, which is driven by toothed gearing at a quarter of the speed of the crank-shaft. Figs. 6, 8, and 9 show views of the valve E. The face of the valve is provided with eight equidistant ports, four for supply and four for exhaust. Four of these passages a, b, c, d lead to the passage F, Fig. 8, and four e, f, g, h lead to the outside of the valve, as shown in Fig. 9. The passage H communicates with the passage F and the passage I with the outside of the valve. A tight joint is maintained between the back of the valve and the end of the casing G by a cup-leather K, the valve M in the passage L in the valve E ensuring that the chamber in which the leather K is situated is always open to supply-pressure. The valve seating, against which the valve works, has six ports, one to each cylinder. A face view of the seating is shown in Fig. 10. The ports both in this seating and in the valve are made of a width subtending an angle of 22À5 degrees. The ports are in pairs and the two ports in each pair are at an angle of forty-five degrees to one another. The ports a, b, c, dare shown in dotted lines, and are in such position that, if the valve is first turned in a direction to carry the port a over the port 2, the cylinders are brought into action in the order 2, 1, 6, 5, 4, 3. Similarly, by rotation of the valve in the opposite direction, the order of operation of the cylinders is 5, 6, 1, 2, 3, 4. The lubricating-pump O is driven off the valve shaft J by an eccentric. Spring-loaded plungers are fitted at the closed ends of the cylinders to ensure that there shall be no obstruction to the backward movement of the piston, To ensure that the valve shall be maintained in its proper position relatively to the crank-shaft, one of the wheels by which its motion is transmitted is constructed with its toothed portion in two parts, which are adjustable simultaneously in opposite directions. Figs. 11 and 12 show the construction of this part of the wheel. The toothed portion is composed of two parts T, which fit against the. projection U of the central part of the wheel. A spindle V carries a part which fits in the part U and carries two oppositely - arranged eccentrics working in blocks W, which can be moved in radial slots in the rings T. The two parts of the wheel can thus be moved in opposite directions and may be locked in positions by bolts X.